Complementary microscopy techniques applied for optimizing the structure and performance of graphene-based hybrids

Wen, Quan; Chen, Zhiqiang; Eastman, Micah; Cottingham, Steven; Manhat, Beth A.; Goforth, Andrea M.; Jiao, Jun

doi:10.1016/j.ultramic.2011.11.010

Cited by 9 publications

(3 citation statements)

References 27 publications

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“…For the CT-Co(OH) 2 /graphene composite, all the peaks of the Co(OH) 2 were present with an additional crystallinity induced at 2θ of 26.45°corresponding to the (002) plane of exfoliated graphene. 21 The other two peaks at 36.78°and 65.28°can be attributed as some impure phase corresponding to CoOOH formation. All the XRD data reveals the brucite-like phase of β Co(OH) 2 .…”

Section: ■ Results and Discussionmentioning

confidence: 97%

Preparation of CTAB-Assisted Hexagonal Platelet Co(OH)₂/Graphene Hybrid Composite as Efficient Supercapacitor Electrode Material

Ghosh

Giri

Das

2013

ACS Sustainable Chem. Eng.

123

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In this paper, our work deals with the preparation of cetyl trimethylammonium bromide (CTAB)assisted hexagonal platelet β Co(OH) 2 via a simple hydrothermal process and its graphene-based hybrid composite with improved electrochemical properties. The prepared materials were successfully characterized by FTIR, XRD, FESEM, TEM, and TGA analysis. The materials were subjected to electrochemical analysis by a three electrode system in a 6 M KOH electrolyte in terms of a cyclic voltammetry, cyclic charge−discharge, and electrochemical impedance study. The CTAB-assisted Co(OH) 2 with hexagonal architecture exhibited the highest specific capacitance of 312 F/g at a 2 mV/s scan rate and 285 F/g at a 2 A/g constant discharge current density. The high utility of pseudocapacitive Co(OH) 2 is achieved only in its graphene-based hybrid composite, which responded with specific capacitance of 532 F/g at a 2A/g current density and a 94% specific capacitance retention over 500 charge discharge cycles.

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Section: ■ Results and Discussionmentioning

confidence: 97%

Preparation of CTAB-Assisted Hexagonal Platelet Co(OH)₂/Graphene Hybrid Composite as Efficient Supercapacitor Electrode Material

Ghosh

Giri

Das

2013

ACS Sustainable Chem. Eng.

123

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“…From the XRD pattern of pristine exfoliated graphene we used, it can be observed that there is a peak appearing at 26.4°(Figure 1(a)), which contributes to the reflection of the (002) plane. 23 The peaks of TiO 2 and G all exist in T/G and Ca 2+ -T/G, indicating that the composites are all successfully synthesized. The micromorphology information of T/G and Ca 2+ -T/G is characterized by TEM.…”

Section: Resultsmentioning

confidence: 83%

“…Therefore, the electrical conductivity of Ca 2+ -T/G will be improved due to an increase in the concentration of charge carriers owing to Ca 2+ doping. From the XRD pattern of pristine exfoliated graphene we used, it can be observed that there is a peak appearing at 26.4° (Figure (a)), which contributes to the reflection of the (002) plane . The peaks of TiO 2 and G all exist in T/G and Ca 2+ -T/G, indicating that the composites are all successfully synthesized.…”

Section: Resultsmentioning

confidence: 94%

Enhancement of Interfacial Charge Transfer of TiO₂/Graphene with Doped Ca²⁺ for Improving Electrical Conductivity

Cai

et al. 2021

ACS Appl. Mater. Interfaces

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Imparting surface coatings with conductivity is an effective way to prevent fire and explosion caused by electrostatic discharge. TiO 2 is a commonly used paint; however, intrinsic TiO 2 has poor electrical conductivity. Herein, we develop a method to make TiO 2 coating highly conductive by doping Ca 2+ into the TiO 2 lattice based on the introduction of graphene. It is demonstrated that doping Ca 2+ increases the carrier density of TiO 2 and its morphology changes from a sphere to a spindle shape, which increases the interfacial contact area between TiO 2 and graphene. Therefore, resistivity can be greatly decreased due to the construction of fast charge transport pathways from TiO 2 to graphene, resulting from an increase in the speed of interfacial charge transfer. In addition, the electronic properties of the samples are also studied through first-principles calculations before and after Ca 2+ doping. The result of the theoretical analysis is in agreement with that of experiments. Thus, the lowest resistivity of Ca 2+ -TiO 2 /graphene can reach 0.004 Ω cm. Consequently, the feature of superior conductivity of the Ca 2+ -TiO 2 /graphene composite endows it with practical application potential in the field of antistatic coating.

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Investigation on microwave absorption capacity of nanocomposites based on metal oxides and graphene

Bhattacharya

Das

2012

J Mater Sci: Mater Electron

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Complementary microscopy techniques applied for optimizing the structure and performance of graphene-based hybrids

Cited by 9 publications

References 27 publications

Preparation of CTAB-Assisted Hexagonal Platelet Co(OH)₂/Graphene Hybrid Composite as Efficient Supercapacitor Electrode Material

Preparation of CTAB-Assisted Hexagonal Platelet Co(OH)₂/Graphene Hybrid Composite as Efficient Supercapacitor Electrode Material

Enhancement of Interfacial Charge Transfer of TiO₂/Graphene with Doped Ca²⁺ for Improving Electrical Conductivity

Investigation on microwave absorption capacity of nanocomposites based on metal oxides and graphene

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Complementary microscopy techniques applied for optimizing the structure and performance of graphene-based hybrids

Cited by 9 publications

References 27 publications

Preparation of CTAB-Assisted Hexagonal Platelet Co(OH)2/Graphene Hybrid Composite as Efficient Supercapacitor Electrode Material

Preparation of CTAB-Assisted Hexagonal Platelet Co(OH)2/Graphene Hybrid Composite as Efficient Supercapacitor Electrode Material

Enhancement of Interfacial Charge Transfer of TiO2/Graphene with Doped Ca2+ for Improving Electrical Conductivity

Investigation on microwave absorption capacity of nanocomposites based on metal oxides and graphene

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Product

Resources

About

Preparation of CTAB-Assisted Hexagonal Platelet Co(OH)₂/Graphene Hybrid Composite as Efficient Supercapacitor Electrode Material

Preparation of CTAB-Assisted Hexagonal Platelet Co(OH)₂/Graphene Hybrid Composite as Efficient Supercapacitor Electrode Material

Enhancement of Interfacial Charge Transfer of TiO₂/Graphene with Doped Ca²⁺ for Improving Electrical Conductivity